Re: [Qemu-devel] [PATCH RFC 0/5] disk deadlines

[Fam Zheng]

On Tue, 09/08 12:11, Kevin Wolf wrote:
> Am 08.09.2015 um 11:20 hat Fam Zheng geschrieben:
> > [Cc'ing address@hidden
> > 
> > On Tue, 09/08 11:00, Denis V. Lunev wrote:
> > > To avoid such situation this patchset introduces patch per-drive option
> > > "disk-deadlines=on|off" which is unset by default.
> > 
> > The general idea sounds very nice. Thanks!
> > 
> > Should we allow user configuration on the timeout?  If so, the option 
> > should be
> > something like "timeout-seconds=0,1,2...".  Also I think we could use werror
> > and rerror to control the handling policy (whether to ignore/report/stop on
> > timeout).
> 
> Yes, I think the timeout needs to be configurable. However, the only
> action that makes sense is stop. Everything else would be unsafe because
> the running request could still complete at a later point.

What if the timeout happens on a quorum child?  The management can replace it
transparently without stopping the VM.

Fam